Two of my favourites return to play a simple game of Hi-Lo. They take it in turns to guess whether the next card on the deck will be higher or lower than the last. Guess right and you're safe; guess wrong and you strip.
The winner gets to pose the loser however she wants, to make sure we get to see everything.

These two are back, for a simple game of Strip Hi-Lo. The top card of the deck is turned over, and each girl takes it in turns to guess whether the next card will be higher or lower. (If the next card is the same, either answer is wrong. Sucks to be you.) Get it wrong, lose a garment... only this time, the winner gets to remove the article from the loser herself.